Mathematics High School

Identify the property being demonstrated for each expression

3 + (5 + 7) = (3 + 5) + 7
(associative property or commutative)

5 + 0 = 5
(associative property or commutative)

Answers

Answer 1

Answer:

1. associative.  2. commutative.  3. identity.

Step-by-step explanation:

hope this helps :)

Answer 2

Answer:

A,B,D

Step-by-step explanation:

Related Questions

How many millimeters are in 1 centimeter?​

Answers

Answer:

10

Step-by-step explanation:

Answer:

10!

Step-by-step explanation:

If you need to find how many millimeters are in a certain amount of cm's, you can multiply the length (amount of cm) by 10, since there are 10 millimeters in a cm.

convert 9472 gram in kilogram ​

Answers

Answer:

9.472 kilograms

Step-by-step explanation:

someone help me!!! please

Answers

Answer:

124568

865421

Step-by-step explanation:

please give 5 stars then i will say the rest

Transformations of quadratics

y=2(x-1)^2+1

y=-(x-3)^2-4

Answers

1)Y=2x-2^2+1
Y=-4x^2+1
Y=-4x4+1
Y=-16+1
Y=-15

2)Y=-x+3^2-4
Y=-x+3x3-4
Y=-x+9-4
Y=-x-4+9
Y=-4x+9
Y=-4x+9
Divide all over -4 gives
Y=x+5
Y=5x

find the selling price $280 tax 5%

Answers

Answer:

The selling price is $294

Step-by-step explanation:

5/100 (280)

0.05 * 280 = 14

5% of 280 equals 14.

To find the selling price we have to add the tax to the price.

$14 + $280 = $294

The selling price is $294

write an equivalent expression for 7^12 * 7^4

Answers

7^16, do you also need the answer?

The equivalent expression of 7¹² × 7⁴ is  7¹⁶.

What is the algebraic expression?

Algebraic expressions are mathematical statements with a minimum of two terms containing variables or numbers.

What is an exponential function?

An exponential function is defined as a function whose value is a constant raised to the power of an argument is called an exponential function.

It is a relation of the form y = aˣ  in mathematics, where x is the independent variable

We have to determine the equivalent expression for 7¹² × 7⁴

⇒ 7¹² × 7⁴

⇒ 7⁽¹²⁺⁴⁾

⇒ 7¹⁶

Therefore, the equivalent expression of 7¹² × 7⁴ is  7¹⁶.

Learn more about the exponential function here:

brainly.com/question/11487261

#SPJ2

please help i have 15 minutes ​

Answers

Answer:

D

Step-by-step explanation:

my math teacher just help me

i hope its right if its not sorry

Answer:

Step-by-step explanation: the 2 one

Helpppppppppp please

Answers

Step-by-step explanation:

Question Says:-

An equilateral triangle is a triangle with three equal sides. The perimeter of an equilateral triangle varies directly with the length of one side. What is an equation that relates the perimeter p and length of a side?

Answer:-

See, let us consider the sides as l as per question.

And, perimeter as p as per question.

We know that:-

The sum of all the boundary gives us the perimeter of the figure.

It is Equilateral Triangle, so the equation will be:-

[tex]l + l + l = p[/tex]

Now, adding it up, we get

[tex]3l = p[/tex]

So, 3l=p relates the side and perimeter.

Hope it helps :)

What are the coordinates on the coordinate plane?

Answers

Answer:

0.9 1.8 2.9

Step-by-step explanation:

Answer:

P is (2,1) M is (6,2) G is (5,5) L is (1,3) i think this is right anyway

Step-by-step explanation:

hope it helped!

p.s it would be cool it you would give me brainliest

Find the scale factor,and find the unknown side lengths.
Help if you can please

Answers

Step-by-step explanation:

Solution,

since two of these triangle are similar so,

i) LK/LJ=MN/NO

or,j/8=18/12

or,j=18×8/12

.°. j = 12m

ii)JK/JL=MO/NO

or,10/8=n/12

or,120/8=n

.°.n=15m

Simplify the expression.
-10-6+)
12
12
12

Answers

it is 12 that is the answer

Simplify: 45÷3+2×8-12+42


Show working

Answers

15+2*8-12+42
15+16-12+42
31-12+42
19+42
61

The roots of a quadratic equation are 7 and -3. Which quadratic equation has these roots?
(x + 7) (x – 3) = 0

(x - 7) (x + 3) = 0

(x – 7) (x – 3) = 0

(x + 7) (x + 3) = 0

Answers

The answer is (x - 7) (x + 3) = 0

Explanation: Put both equations equal to 0, so it looks like this: (x - 7) = 0 (x + 3) = 0
It doesn’t matter what you do first but I’ll start with (x - 7) = 0
First you remove the parenthesis
x - 7 = 0
Next you add the 7 on both sides. You do this to cancel the 7 so that the x is by itself.
x = 7
It’s the same thing for the (x + 3) = 0 but I’ll show you anyways
Remove parentheses
x + 3 = 0
Subtract the 3 from both sides that way the 3 cancels out and the x is on its own
x = -3

0.26 as a fraction? And 0.79 as a fraction?

Answers

Answer:

0.26=13/50 0.79=79/100

Step-by-step explanation:

All decimals are over a number in the power of ten. If you say the decimals out loud you would say "26 hundredths " and "79 hundredths" so you place the decimals over 100 and then simplify.

Answer: 12/50 and 79/100

Evaluate (18)^2-(15)^2
Please show working.

Answers

Answer:

99

Step-by-step explanation:

You can solve it by Squaring/multiply 18 by itself and 15 by itself then subtract them both:

(18 × 18) - (15 × 15)

324 - 225

99

You could also do difference of two squares:

(x² - y²)

= (x + y) (x - y)

= (18 + 15) (18 - 15)

= (33) (3)

= 99

Answer:

99

Step-by-step explanation:

Evaluate

= (18)^2-(15)^2

= 324 - 225

= 99

whats the answer to this???

Answers

Measure angle EFG = 15 degrees
Measure angle GFH = 15 degrees

Find the value of x. Draw a triangle and label each interior angle before solving.
Then find the angle measures of the polygon.

Angle one: 2x°, angle two: xº, angle 3: (X + 8)°

Answers

Sum of all angles in a triangle = 180°

Which means :-

∠1 + ∠2 + ∠3 = 180°

[tex]2x + x + x + 8 = 180°[/tex]

[tex]4x + 8 = 180°[/tex]

[tex]4x = 180 - 8[/tex]

[tex]4x = 172[/tex]

[tex]x = \frac{172}{4} [/tex]

[tex]x = 43[/tex]

Angle 1 :-

= 2x

= 2 × 43

= 86°

Angle 2 :-

= x

= 43°

Angle 3 :-

= x + 8

= 43 + 8

= 51°

[tex]therefore \: , \: the \: value \: of \: x = 43°[/tex]

2. What is the answer to the first
example?
8x + 1
8x - 1

Answers

Answer:

21

Step-by-step explanation:

I am pretty sure it’s 21

y=-3x+16 y=7 substitution method

Answers

-5
-3(5)= -21

-21+16= -5

x-8=-15 solve for x

Answers

Answer:

x=-7

Step-by-step explanation:

x-8=-15

add eight to both sides since it's negative

X=-7 You add the negative 8 from both sides which leaves you with X=-7

A room measures 12 feet by 12 feet. A couch is 10 feet and 6 inches long. If you center the couch in the middle of the room, how far will each end of the couch be from the nearest wall?
inches

Answers

Answer:

3/4 feet or 0.75 feet.

Step-by-step explanation:

12 feet - 10.5 feet is 1.5 feet.

1.5 / 2 is 0.75 of a feet.

3/4 feet

Hope this helps.

Please help thanks I appreciate it .

Answers

it’s congruent because both of the shapes are very similar to each other.
I’m pretty sure the answer is B!! :)

Is it possible to form a triangle using 15 in, 12 in, 8 in ? Why or why not?

Answers

Answer:

No

Step-by-step explanation:

Use the pythagoreon theory

15^2+12^2=8^2

454=64

Since they do not equal the same number you can not form a triangle, and no matter how many times you switch the numbers around they will not equal.

Jackson has 2,000 baseball cards in his collection. Gabe has 110 as many baseball cards in his collection as Jackson. How many baseball cards does Gabe have in his collection?
Enter your answer in the box

Answers

Answer:

220000

Step-by-step explanation:

2000x110=220000

Why does he have so man though???

Answer:

200 cards

Step-by-step explanation:

Given: Jackson has 2,000 baseball cards in his collection. Gabe has  as many baseball cards in his collection as Jackson.

To Find: How many baseball cards does Gabe have in his collection.

Solution:

Total number of cards Jackson has in his collection

Let number of cards Gabe has =

Now,

The shadow of a 5-foot tall post is 10 feet long. At the same time, a tree casts a shadow that is 24 feet long. What is the height of the tree?
A.
14 feet
В.
12 feet
C.
18 feet
D. 2 feet

Answers

Answer:

C. 12 feet.

Step-by-step explanation:

The lamp post has a shadow that's twice as long as it'a actual height. The tree's shadow is 24 feet long, so it would be 24/2, which is 12 feet.

when sediment is transported down a mountain and along a stream we are seeing the conservation of what

Answers

Answer:

The answer is matter.

5×5×5×5×5×5×5×5×5÷5×5​

Answers

Answer:

582

Step-by-step explanation:

((5•5•5•5•5•5•5•5•5)/5)•5= 1,953,125, its basically ((5^9)/5)•5

Which biconditional statement below is true?


Angles are congruent if and only if they are vertical angles.
Angles are congruent if and only if they are vertical angles.

Angles are supplementary if and only if their sum is 180°.
Angles are supplementary if and , only if their sum is 180°.

A number is a whole number if and only if it is a natural number.
A number is a whole number if and only if it is a natural number.

Points are collinear if and only if they are coplanar.
Points are collinear if and only if they are coplanar.

Answers

Answer:  Angles are supplementary if and only if their sum is 180° is true.

Step-by-step explanation:

Test by making both parts negative: Angles are not supplementary if and only if their sum is not 180°  This is also true.

Find the slope of the line through the given points. (1,3) and (0,−9)

Thank you so much :)

Answers

Answer:

The answer is 12

Step-by-step explanation:

The slope of a line given two points can be found by using the formula

[tex]m = \frac{ y_2 - y _ 1}{x_ 2 - x_ 1} \\[/tex]

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(1,3) and (0,−9)

The slope is

[tex]m = \frac{ - 9 - 3}{0 - 1} = \frac{ - 12}{ - 1} = 12 \\ [/tex]

We have the final answer as

12

Hope this helps you

The slope of the line would be 12.

I need help with this

Answers

Answer:

K

Step-by-step explanation:

TGS ≅ KEL

This means angle T ≅ angle K

This means angle G ≅ angle E

This means angle S ≅ angle L

Hello.

If ΔTGS ≅ ΔKEL, then angle ∠T corresponds to ∠K.

∠T ≅ ∠K

∠G ≅ ∠E

∠S ≅ ∠L

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